A method for rebuilding data when changing erase block sizes in a storage system is provided. The method includes determining one or more erase blocks to be rebuilt and allocating one or more replacement erase blocks, wherein the one or more erase blocks and the one or more replacement erase blocks have differing erase block sizes. The method includes mapping logical addresses, for the one or more erase blocks, to the one or more replacement erase blocks and rebuilding the one or more erase blocks into the one or more replacement erase blocks, in accordance with the mapping.
Legal claims defining the scope of protection, as filed with the USPTO.
3. The method of claim 1, wherein there is more than one erase block to receive rebuilt data.
4. The method of claim 1, wherein the erase block receiving rebuilt starts with metadata that maps contents of the erase block to a RAID stripe and a shard within the RAID stripe, and wherein there is more than one erase block to receive rebuilt data.
5. The method of claim 1, wherein the identifying the erase block to receive rebuilt data is responsive to failure of a solid-state storage drive.
7. The method of claim 1, wherein the differing sizes include the erase block to receive rebuilt data having a larger size than the erase block from which the data is received.
10. The computer-readable media of claim 8, wherein there is more than one erase block to receive rebuilt data.
11. The computer-readable media of claim 8, wherein the erase block receiving rebuilt data starts with metadata that maps contents of the erase block to a RAID stripe and a shard within the RAID stripe, and wherein there is more than one erase block to receive rebuilt data.
13. The computer-readable media of claim 8, wherein the differing sizes include the erase block to receive rebuilt data having a larger size than the erase block from which the data is received.
16. The storage system of claim 14, wherein there is more than one erase block to receive rebuilt data.
17. The storage system of claim 14, wherein the erase block receiving rebuilt data starts with metadata that maps contents of the erase block to a RAID stripe and a shard within the RAID stripe, and wherein there is more than one erase block to receive rebuilt data.
20. The storage system of claim 14, wherein the differing sizes include the erase block to receive rebuilt data having a larger size than the erase block from which the data is received.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
August 9, 2021
March 14, 2023
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